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5-2

TIRES - WHEELS - SUSPENSION

Most tire, wheel, and suspension related problems are due to excessive loads, extreme conditions, and

improper maintenance. Tire, wheel, and suspension problems can be easily detected and solved by check-
ing the following guide.

SYMPTOM

PROBLEM: REMEDY

VIBRATIONS WHILE DRIVING

Improper tire inflation:

inflate to proper pressure.

Tires cupped or have flat spots:

replace tires.

Wheels bent or loose:

replace or tighten.

Tires incorrectly mounted:

remount.

Mud in wheels:

clean wheels.

Tire(s) out of balance:

balance tires.

Brakes dragging:

locate cause and repair.

Object(s) stuck between duals:

remove object(s).

RAPID TIRE WEAR/
DETERIORATION:

CENTER TREAD WEAR

Over inflation:

deflate to correct inflation.

SHOULDER TREAD WEAR - BOTH
SHOULDERS

Under inflation:

increase inflation to correct PSI. Check axle

alignment.

Overload:

loads are above rated tire capacity. DO NOT load above

rated tire capacity.

SHOULDER TREAD WEAR - ONE
SHOULDER

Axle damage:

straighten or replace axle.

Axles not parallel:

check axle alignment.

OVERALL TREAD WEAR

Overloading:

check tire load rating.

High speeds:

adjust speed according to road and load conditions.

Incorrect dual matching:

properly match dual tires.

Front and rear axle suspension air bags not inflated:

Adjust

front and rear axle ride height control valves to proper settings.

TIRE FLAT SPOTS

Quick stops:

adjust braking practices.

Grabbing brakes:

adjust brakes properly.

Worn or loose wheel bearings:

adjust or replace as needed.

Out of balance wheels and tire:

balance wheels and tires.

Check ABS system function.

Front and rear axle suspension air bags not inflated:

Adjust

front and rear axle ride height control valves to proper settings.

UNEVEN WEAR

Suspension bushings worn:

replace bushings.

Worn or loose wheel bearings:

adjust or replace as needed.

Out of balance wheels and tires:

balance wheels and tires.

5-2

Содержание 325C

Страница 1: ...MODEL 325C 326C 327C 329C DETACHABLE TRAILER OPERATOR S MANUAL 1900 North Street Marysville KS 66508 785 562 5381 F 490 1107 11 07...

Страница 2: ......

Страница 3: ...MODEL 325C 326C 327C 329C DETACHABLE TRAILER OPERATOR S MANUAL PURCHASED FROM DATE ADDRESS PHONE NO SERIAL NO i...

Страница 4: ...olved in individual prob lems between you your dealer or Landoll Manufacturing To contact NHTSA you may either call the Auto Safety Hotline toll free at 1 800 424 9393 or 366 0123 in Washington D C ar...

Страница 5: ...SWITCH 3 12 3 20 SWINGOUT OUTRIGGER PLATFORM EXTENSION SET UP 3 13 3 21 PREPARATION FOR LOADING AND UNLOADING 3 14 3 22 LOADING THE SEMITRAILER 3 15 3 23 SECURING THE LOAD 3 15 3 24 PREPARATION FOR T...

Страница 6: ...IF NOT AVOIDED WILL RESULT IN DEATH OR SERIOUS INJURY WARNING WARNING INDICATES A POTENTIALLY HAZARDOUS SITUA TION WHICH IF NOT AVOIDED COULD RESULT IN DEATH OR SERIOUS INJURY CAUTION CAUTION INDICAT...

Страница 7: ...y IF YOU HAVE ANY QUESTIONS CONTACT LANDOLL CORPORATION 1900 NORTH STREET MARYSVILLE KANSAS 66508 or phone 785 562 5381 or 800 428 5655 or FAX 785 562 4893 SECTION 5 is a troubleshooting guide to aid...

Страница 8: ......

Страница 9: ...UP QUICK COUPLERS FLAT FACE 3 4 BODY SIZE MAXIMUM OPERATING PRESSURE 2500 PSI OPERATING FLOW 17 GPM ELECTRICAL HOOKUP 7 WAY CONNECTOR AIR HOOK UP COLOR CODED GLAD HANDS SPECIFIC BOLT TORQUES AIR RIDE...

Страница 10: ...65 81 90 112 9 16 12 55 62 80 100 110 137 9 16 18 60 75 90 112 130 162 5 8 11 75 94 110 137 170 212 5 8 18 85 106 130 162 180 225 3 4 10 130 162 200 250 280 350 3 4 16 150 188 220 275 320 400 7 8 9 12...

Страница 11: ...0 134 146 75 85 16 115 125 202 218 109 121 20 160 180 248 272 213 237 24 185 215 303 327 238 262 32 250 290 310 340 LANDOLL CORPORATION HYDRAULIC FITTING TORQUE SPECIFICATIONS 37o JIC ORS ORB REV 10 9...

Страница 12: ......

Страница 13: ...ing emergency valve or by disconnecting the emergency glad hands 3 1 2 Air Brake System The air brake system of the semitrailer is oper ated from the towing vehicle after coupling The towing vehicle s...

Страница 14: ...OACH PLATE ELECTRICAL AND AIR STORAGE COMPARTMENT REAR BUMPER ABS BLINK CODE DIAGNOSTIC TOOL REAR FLAG HOLDER ABS LIGHT AIR RAISE LOWER OPT SCALE O MATIC OPT trailer terminology Figure 3 1 Models 325...

Страница 15: ...in plate sufficiently to set proper coupling height Drain all air and moisture from the towing vehicle air brake system following towing vehicle manufacturer s instructions 3 2 3 Before pre coupling t...

Страница 16: ...source of coupling failure repair before continuing and repeat Section 3 3 3 and 3 3 4 3 3 5 Check that the towing vehicle couples securely to the semitrailer before setting tow ing vehicle and semitr...

Страница 17: ...ever See Section 3 12 DOWN until the semitrailer rests completely on the load blocks See Figure 3 1 3 5 6 Check the operation of all lights and sig nals on the semitrailer for proper response to switc...

Страница 18: ...RELEASE THROTTLE KEY SWITCH OFF ON START LL PULL TO RELEASE OFF ON START LANDOLL hydr controls GOOSENECK LIFTARM LEVER TRAILER LIFT LEVER GOOSENECK LOCK HANDLE LOAD BLOCK TRIP HANDLE Figure 3 3 Hydrau...

Страница 19: ...urning the tractor keyswitch on The warning lamp should go off once the semitrailer exceeds 4 mph If the warning lamp does not go off a fault exists in the semitrailer ABS Once the vehicle speed excee...

Страница 20: ...ch them to the tractor glad hand holders If present install dummy glad hands on trailer couplings 3 8 7 Disconnect the 7 pole cable and hydrau lic lines from the semitrailer and store with the tractor...

Страница 21: ...ent of the gooseneck or allow ing the weight of the semitrailer deck and load to rest on the load blocks Also this lowers the gooseneck lift arms permitting the transport of the detached gooseneck 3 1...

Страница 22: ...ated near the HAND VALVE This gauge pro vides air pressure information for adjusting the air ride system manually 3 15 1 Minimum air pressure should be at least three 3 psi Loosen the minimum adjust m...

Страница 23: ...height The AIR RIDE HEIGHT CONTROL VALVE must be in the OFF position for the AUTOMATIC HEIGHT VALVES to function POSITION The AUTOMATIC HEIGHT VALVES have no particular position but are adjusted const...

Страница 24: ...ully choked This posi tion is used for starting the engine ADJUSTED INThe throttle should be turned clock wise to decrease engine speed and counter clockwise to increase engine speed PUSHED IN When th...

Страница 25: ...KS OR TIRES MUST BE LOADED ON THE MAIN DECK NOT ON EXTENSION BRACK ETS FAILURE TO LOAD EXTENSION BRACKETS PROPERLY CAN RESULT IN EQUIPMENT DAMAGE AND PER SONAL INJURY 3 20 4 Center the load on the tra...

Страница 26: ...semitrailer brakes See Figure 3 9 Chock trailer wheels 3 21 3 Engage the hydraulic pump 3 21 4 Move TRAILER LIFT LEVER See Section 3 11 to the up position raising the semitrailer until a clearance of...

Страница 27: ...NOT ALLOW SLACK IN TIEDOWNS A SHIFTING LOAD MAY CREATE ENOUGH MOMENTUM TO BREAK HI TEST CHAINS OR STRAP TIES SLACK IN TIEDOWNS MAY RESULT IN DAM AGE TO THE LOAD AND DEATH OR SERIOUS INJURY TO PERSONS...

Страница 28: ...3 16 GOOSENECK FRAME LOAD PLATE LOAD BLOCK TRIP HANDLE LOAD BLOCK WELDMENT LOAD PIN LOCK ASSEMBLY FRAME GOOSENECK 326 327 detach Figure 3 9 Gooseneck Attachment to Frame...

Страница 29: ...the semitrailer until enough clearance is obtained to seat the load blocks CAUTION FAILURE TO SUPPORT THE SEMI TRAILER FULLY ON THE LOAD BLOCKS DURING TRANSPORT AND PARKING MAY RESULT IN DAMAGE TO THE...

Страница 30: ...AIN MEMBER TRUNNION BULKHEAD TRAILER BULKHEAD 1 1 2 CONNECTING BOLT TRUNNION ALIGNMENT PIN TRUNNION LOAD PLATE AIR HEIGHT CONTROL VALVE HAND VALVE AIR PRESSURE GAUGE AIR BAG CROSSTUBE detach trunnion...

Страница 31: ...em to allow the front of the main members to rest solidly on the blocks f Disconnect the trunnion electrical and air lines from the semitrailer bed and store inside the trunnion frame g Remove the fou...

Страница 32: ...sfer load weight If your semitrailer is equipped with the ad justable kingpin option the procedure to change the kingpin is as follows See Figure 3 11 for parts identification 3 29 1 Remove the hairpi...

Страница 33: ...3 3 3 30 2 Pull the throttle completely out This closes the choke on the engine 3 30 3 Turn the key to the START position The engine should crank and then start If the engine does not start refer to S...

Страница 34: ...l devices such as re mote controls may be powered from the auxiliary circuit while the semitrailer is stationary Back up power to the ABS is supplied through the stop lamp red circuit No 4 pin on the...

Страница 35: ...riodically check drain holes in the bot tom of the relay valve for trailers with air brakes and storage compartments They must be open at all times to avoid moisture en trapment 3 33 HOT WEATHER OPERA...

Страница 36: ......

Страница 37: ...rts must be repaired or replaced at once Deter mine the cause of any binding or hydraulic leakage at once Correct the problem before using the tractor or trailer b Use the troubleshooting section Chap...

Страница 38: ...UCT WEIGHT AND OR TYPE AMOCO EXXON PHILLIPS TEXACO ALL YEAR Lit Multi purpose 1 Grease Ronex Multi purpose Grease Phil Lube M W Grease MarFax All Purpose ALL YEAR Industrial 2 Oil 32 Estic 32 Condor 3...

Страница 39: ...RALIZED GREASE SYSTEM LOCATION CENTRALIZED GREASE SYSTEM TRIPLE AXLE 325C 327C 329C CAM BUSHINGS SHAFT SLACK ADJUSTERS 1 CENTRALIZED GREASE SYSTEM TANDEM AXLE 326C lube points p2 Figure 4 2 Lubricatio...

Страница 40: ...volv ing typical stresses and mechanical surfaces Val ues are based on the physical limitations of clean plated and lubricated hardware In all cases when an individual torque value is specified it tak...

Страница 41: ...USPENSION I T I T HYDRAULIC OIL I I R 1 c HYDRAULIC FILTER R R HOSES Inspect Replace as needed I I WINCH GEAR CASE OPT I I 2 c I Inspect R Replace T Tighten Adjust Torque L Lubricate C Clean NOTES a P...

Страница 42: ...wear pitting chipping or other damage 4 3 GOOSENECK FRAME AND DECK 4 3 1 Repairing Structural Defects If any structural defect is found the fault must be corrected before further use of the vehicle To...

Страница 43: ...ately burns out or the breaker trips locate the cause of the electrical short and repair 4 5 5 A light that repeatedly burns out usually indicates a loose connection poor system ground or a malfunctio...

Страница 44: ...4 8 Figure 4 3 Models 325 326 327 329C Wiring Diagram...

Страница 45: ...IDENTIFICATION CENTER DS21 LEFT TURN YELLOW DS22 RIGHT TURN YELLOW DS23 ABS MALFUNCTION INCATOR YELLOW DS24 LEFT REAR SIDE MARKER RED DS25 RIGHT REAR SIDE MARKER RED 325 326 327 329C WIRING PARTS LIST...

Страница 46: ...and insert a 2 005 plug in the locks c Check for a tight fit The plug should be snug but you should be able to rotate it by applying some force d If the plug fits loosely tighten by rotating the nut o...

Страница 47: ...re 4 6 If the yoke are short of the ends of the locks it will be necessary to grind the outside surfaces of the yoke with a belt sander or grinder until it fits precisely into place See Figure 4 6 If...

Страница 48: ...8 27 X 2 5 8 GREASE FITTING LOCK PIM 1 4 X 2 COTTER PIN 1 2W FLAT WASHER 1 2 20 ESNA NUT 1 2 20 X 1 3 4 HEX HEAD CAP SCREW 1 2W FLAT WASHER 1 2 X 2 3 4 ROLL PIN TORSION SPRING RH SECONDARY LOCK CAM PL...

Страница 49: ...Insert the 1 2 bolt through the washers the roller the cam and the top plate lug and se cure with a 1 2 lock nut Check the cam to be sure it can move freely v Place a 5 8 flat washer between the yoke...

Страница 50: ...the shocks for excessive wear b To obtain proper torque it is recommended to back off nuts clean threads oil threads with SAE 20 oil then tighten c Replacing the equalizer bushings and the torque arm...

Страница 51: ...Second number listed is torque required if bolt head designated with Holland Neway b Check all other suspension components for any sign of damage looseness wear or cracks c With trailer on level surfa...

Страница 52: ...is cor rect Consult Landoll Service Center if correct height cannot be obtained f Loosen the 1 4 adjusting lock nut located on the adjusting block allowing the control arm to move approximately 1 inc...

Страница 53: ...gative camber align ment can be checked as follows a Remove wheel hub and bearing assem blies b Place a 3 point axle gauge against the front side of the axle and adjust each axle gauge point to the ax...

Страница 54: ...4 18 Figure 4 13 Checking Axle Alignment Figure 4 14 Examples of Camber...

Страница 55: ...must be replaced immediately b Air Ride Suspension Axles The air ride suspension is aligned and ad justed at the factory and it should not be necessary to align the axles If however it does become ne...

Страница 56: ...ir daily A drain cock on the bottom of each air reservoir vents the tank to drain collected water and oil If held open air pressure in the tanks is relieved causing the emergency or parking brakes to...

Страница 57: ...ion the inlet ports by loosening the service chamber clamp bands and rotating center housing such that ports are located according to alignment marks made during disassembly then retighten the clamp b...

Страница 58: ...retainers from the rollers 5 Press down on the bottom brake shoe and remove the lower cam roller Lift the top shoe and take out the top cam roller 6 Lift out the shoe retractor spring which is now fre...

Страница 59: ...4 23 Figure 4 17 Axle and Brake Assembly...

Страница 60: ...e This rotation indicates that an excessive clearance condition has been determined by the slack adjuster and it is making an adjustment to compensate On each subsequent brake release the amount of ad...

Страница 61: ...and cut rod to length 13 If the push rod is not fully engaged in clevis body install a new push rod cut to length 14 Install the slack adjuster on the cam shaft 15 Rotate the manual adjuster shaft CW...

Страница 62: ...formation b When resurfacing a drum allow at least 0 040 inches under the maximum diameter for additional wear WARNING TURNING A BRAKE DRUM BEYOND 0 040 INCHES UNDER THE MAXIMUM DIAMETER WILL RESULT I...

Страница 63: ...tening the nut until it is snug against the outer bearing cone Remove the hub support allowing the hub to rest on the bearings l Install and adjust bearings See Section 4 10 4 11 Wheel Bearing Lubrica...

Страница 64: ...to in sure proper seating of the bearings and cups in the wheel hub f Loosen the inner adjustment nut so that the wheel will turn freely g Retighten the inner adjustment nut to 50 ft lbs while rotati...

Страница 65: ...from be tween duals 4 12 2 Tire Matching Both tires on the same spindle must be the same size in order to properly distribute the load and braking forces between them The tire must be mounted on a rim...

Страница 66: ...eful not to damage the stud threads Be sure the valve stems for both the inner and outer tire are accessible d Install the flange nut pilot mount and tighten to 50 foot pounds using the sequence in Fi...

Страница 67: ...hoses weekly for cracks or leaks If a valve or line leaks it should be re placed immediately 4 13 3 Check the engine oil each time before using Oil level should be maintained be tween the ADD and FULL...

Страница 68: ......

Страница 69: ...ire loose clean and tighten ground LIGHTS FLICKERING Wires shorted or loose locate insulate replace or tighten Grounding through fifth wheel locate broken ground wire tractor or semitrailer LIGHTS DIM...

Страница 70: ...verload loads are above rated tire capacity DO NOT load above rated tire capacity SHOULDER TREAD WEAR ONE SHOULDER Axle damage straighten or replace axle Axles not parallel check axle alignment OVERAL...

Страница 71: ...R TRACKING PROBLEMS TRACKS TO ONE SIDE Axle alignment re align axle TRACKS TO EITHER SIDE Broken or bent springs or equalizers replace defective parts Axles not parallel realign axles AIR RIDE HEIGHT...

Страница 72: ...e drum Broken brake chamber spring replace spring Brake chamber pushrod binding re align brake chamber bracket Air brake line loose or broken tighten or repair UNEVEN BRAKES See SINGLE BRAKE DRAGGING...

Страница 73: ...AKES GRABBING Grease on brake linings reline brakes Brake rigging binding align brakes or replace bent parts Defective brake valve on tractor repair or replace valve Defective relay emergency valve re...

Страница 74: ...e drums check for defective or misadjusted brake linings distorted or over machined drums Also check for op erating conditions or loads that create severe or excessive brake applications BRAKES PULL T...

Страница 75: ...sive load check unit specifications for load limits Slipping or broken pump drive repair or replace couplings Check for alignment SYSTEM OPERATES ERRATICALLY Air in the system check suction side of sy...

Страница 76: ...l replace clean or add oil as needed Water in oil replace oil Air leaks check suction line and component seals for suction leaks Replace defective parts NOISY PUMP Low incorrect foamy oil replace clea...

Страница 77: ...5 6 HYDRAULIC POWER SUPPLY ENGINE PACKAGE To troubleshoot the engine in the hydraulic engine package please refer to the owner s manual that was provided with the engine package 5 9...

Страница 78: ...NOTES 5 10...

Страница 79: ......

Страница 80: ...25C 326C 327C 329C Detachable Trailer Operator s Manual Re Order Part Number F 490 1107 LANDOLL CORPORATION 1900 North Street Marysville Kansas 66508 785 562 5381 800 428 5655 WWW LANDOLL COM F 490 11...

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